Please help fast *15 pts*
What does "stimulated emission of radiation" mean?
A. Radioa...
Physics, 29.04.2021 22:50 ELIZABETH7777
Please help fast *15 pts*
What does "stimulated emission of radiation" mean?
A. Radioactive particles in a laser emit gamma rays of the same wavelength.
B. Gas particles in a laser emit coherent light when bombarded with X-rays.
C. Elctromagnetic currents are produced by neon particles when they bump into helium particles.
D. Gas particles in a laser emit photons of light when exposed to an electric current.
Answers: 2
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If the chemical properties of a substance remain unchanged and appearance or shape of a substance changes it is called a ?
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Which additional product balances the reaction h2so4 + 2naoh → na2so4 + 2h2o 2oh h2o2 h3o
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FÃsica: un futbolista patea hacia el arco con una velocidad de 15m/ah, calcular: a)el alcance para un ángulo de tiro de 25º, b) el tiempo que el balón permanece en el aire.
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Physics, 22.06.2019 15:00
Astudent throws a water balloon with speed v0 from a height h = 1.76 m at an angle θ = 21° above the horizontal toward a target on the ground. the target is located a horizontal distance d = 9.5 m from the student’s feet. assume that the balloon moves without air resistance. use a cartesian coordinate system with the origin at the balloon's initial position. (a) what is the position vector, rtarge t, that originates from the balloon's original position and terminates at the target? put this in terms of h and d, and represent it as a vector using i and j. (b) in terms of the variables in the problem, determine the time, t, after the launch it takes the balloon to reach the target. your answer should not include h. (c) create an expression for the balloon's vertical position as a function of time, y(t), in terms of t, vo, g, and θ. (d) determine the magnitude of the balloon's initial velocity, v0, in meters per second, by eliminating t from the previous two expressions.
Answers: 3
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